etwenandClaude Opus 4.8
3556e25e96
BBoxDump prints per-leaf world-space bounding boxes (to work out each connector's mating-face axis); wired as `SmokeTest --bbox <file>`. Also tracks the previously untracked v0.3.1 release notes. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
3.0 KiB
3.0 KiB
v0.3.1 — First public release: 3D STEP viewer with measurement & assembly fit-check
A lightweight Windows desktop viewer for STEP / STL / DXF — open a part, measure it, and check how two parts fit together, without firing up a heavyweight CAD suite.
✨ New features
View & assembly tree
- Import multiple CAD files at once (STEP / STL / DXF) via the toolbar, drag-and-drop,
or the command line (
STPViewer.exe a.stp b.stp). - STEP product structure is rebuilt into an assembly tree — toggle visibility, recolor (cascades to children), and zoom-to any node; whole-file remove and outline-edge toggle.
- Smooth orbit / zoom / pan even on large assemblies (hundreds of thousands of triangles).
Measurement (pick a mode, click the model)
- Point (snaps to nearby vertices), two-point distance + ΔX/ΔY/ΔZ, edge length (line / curve / arc with radius), face area + surface type, circle center / radius / diameter / circumference, angle between two faces or edges, and face-to-face minimum gap.
- Edge length, radius and angle use exact B-rep values; area and gap are mesh-based.
- Switch units mm ⇄ inch anytime — existing measurements and 3D labels convert live.
Assembly fit-check (mate a male/female pair and verify)
- Two-point align — click a point on the part to move, then the target point, to slide the whole file into place.
- Three-point align — pick 3 feature points on each file to solve a full rotate+translate in one shot, for parts that aren't already oriented the same way.
- Axis rotate — rotate the selected file ±90° about X / Y / Z to square it up.
- Drag mode (hand cursor) — left-press a part and drag it along the screen plane.
- Gizmo — XYZ arrows to move along an axis (independent of view angle, ideal for pushing along a mating axis) and rings to rotate any angle. The gizmo always renders on top, so it is never hidden inside a solid part.
- Interference check — for two visible files, shows red intersection lines where they collide, or the minimum gap when they don't (gap ≈ 0 means a clean fit).
Section & export
- Section view along X / Y / Z with a position slider and flip, to inspect mating internals.
- Export measurements to CSV (opens cleanly in Excel) and save a 2× PNG screenshot of the view.
📦 Downloads
Two builds are produced:
| Build | Needs .NET 8 Desktop Runtime? | Notes |
|---|---|---|
Standard (STPViewer_v0.3.1) |
✅ Yes | Smaller; for machines that already have the runtime |
Portable (STPViewer_v0.3.1_portable) |
❌ No | Runtime bundled — unzip and run, no install / admin needed |
Run STPViewer v0.3.1.exe.
🔗 Links
- Overview & usage: README.md
- Architecture & design: ARCHITECTURE.md
Full changelog: first public release — commit history